3. Inventories

3 Months Ended

Mar. 31, 2020

Inventory Disclosure [Abstract]

Inventories

Inventories consist of :	March 31, 2020		December 31, 2019
Materials	$	897,973	$	911,054
Work in process		77,255		10,284
Finished goods		3,203,506		6,519,012
Total	$	4,178,734	$	7,440,350

Finished goods includes consigned inventory of approximately $848 thousand at March 31, 2020 and approximately $1.8 million at December 31, 2019. The Company reviews inventory for obsolete and slow-moving products each quarter and makes provisions based on its estimate of the probability that the material will not be consumed or that it will be sold below cost. The provision for inventory reserves was negligible for both three months ended March 31, 2020 and 2019, respectively.